This is the 8862nd most frequent Spanish word.
termina
"Termina" means "ends" or "finishes" (third person singular of "terminar").
In this sentence, 'termina' is used as a singular form of 'terminar,' meaning 'to end,' associated with the third person singular subject 'la clase', indicating the end of the class.
La clase termina a las cinco.
The class ends at five.
Here, 'termina' is used to indicate the action of completing an activity, namely reading, using the third person singular present tense.
Cuando termina de leer, siempre comenta sobre el libro.
When she finishes reading, she always comments about the book.
In this case, 'termina' represents the conclusion of the movie's duration, functioning as the third person singular present form of 'terminar'.